Brake Abs Warning Light problems of the 2013 Ford Edge

While driving my 2013 Edge (148,000 miles), when going to apply the break it suddenly did not want to break causing me try to veer from traffic to avoid an accident with another vehicle. Never had a warning or issue before this. The pedal will then go all the way down. Edge has an fsa item for extended warranty of the break booster. Taking to dealership I was informed that the master cylinder was bad. The mechanics I spoke to state that the master cylinder and brake booster go hand in hand so to speak yet Ford states they are not responsible for that only the brake booster. Upon looking up customer issues for this I saw the 2011-2013 f150s have the same issues and both the master cylinder and brake booster were being replaced by Ford at no charge. Why not the Edge? it is clearly having the same issues and my brakes are in good condition. The dealership also stated the abs hydraulic control assembly was bad, yet the abs light has not turned on and I am not sure this is accurate as prior to taking to the dealership I had a mechanic look at it and they told me it was the brake booster and master cylinder.

Brake pedal travels all the way to the floor during sudden stop situations and does not go back to normal. Will self correct after vehicle sits for a few hours. After mutiple occurrences and attempted repairs traction control and abs lights illuminated. This helped the Ford dealer determine the defective parts. This vehicle has been at the dealer since 11/9/18 and there are still no Ford factory parts available. I was number 208 out of 228 on the back order list. An aftermarket parts was installed with out my knowledge or authorization and Ford will not provide any warranty for this part. I believe this is a safety concern that should be looked into.